JPH0241650A - Quasi-curved linear motor - Google Patents

Abstract

PURPOSE:To reduce mold clearance, and to decrease mandays on punching and assembly by disposing a quasi-curved primary-side stator, in which the stator composed of a rectilinear core and a corner core are combined, to the curved section of a carrying path. CONSTITUTION:Corner cores 4, cross sections of which take an inverted T shape and base sections 4a of which take a fan shape, are held among stators 3A in which rectilinear pectinate cores 5 are superposed. The corner cores 4 are attached at both end sections, and continuously contacted to an arcuate shape by clamping plates 11 and clamping bolts 10, and windings 7 are wound in grooves. A quasi-curved primary side stator 3 having such structure is arranged stuck fast to the primary side stator on the carrying path of a rectilinear section. All of the rectilinear cores 5 have the same shape, thus acquiring mold clearance and mandays on punching at low cost, then facilitating assembly. Even when the radius of curvature of the curved section of the carrying path is changed, the angle of the fan shape of the corner core 4 may be altered.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a curved linear motor, and more particularly, to the transportation of semiconductor-related parts, hospital specimens, medical charts, etc. along a conveyance path having a curved portion, and in particular, This invention relates to a pseudo-curved linear motor for three-dimensional transportation.

[Prior Art] Generally, when parts or products made of a non-magnetic conductive material are transported along a conveyance path with a curved part by a linear motor, the linear motor has a rectangular cross section as shown in FIG. A plurality of linear primary stators 2.3b of a linear induction motor are arranged on the rail 1.

As is clear from FIG. 5, there are a plurality of linear primary stators 3b arranged along the arc of the curved part and a linear primary stator 2 arranged in the straight part. It is unavoidable that structural gaps 8 and 9 will occur between the two primary stators 3b and between the plurality of primary stators 3b. In this gap, the magnetic flux becomes weak, and therefore the thrust becomes intermittent, making smooth acceleration impossible, making it impossible to transport semiconductor-related parts that require no impact, or hospital specimens, etc.

In addition, it is extremely difficult to control the speed of the transported object in unstable curved sections where the thrust is intermittent, and in the case of three-dimensional transport, there are problems such as sometimes being unable to ascend due to gravity. In order to solve the problem, an integral curved-shaped stator was devised as shown in 3a of Fig. 6.
3- /I93 /l7S3 "It has been filed as a curved linear motor j.

[Problems to be Solved by the Invention] However, as is clear from FIG. Since the curvature of the core 5a is different, the pitches p and p' (see Figs. 9 and 10) are changed and punched (it is necessary to punch out the iron core 5a, which has been processed into an R shape in advance,
5b, etc. are piled up to a predetermined thickness along the tightening bolts, fixed with tightening bolts to form the shape shown in Fig. 8, then winding wire 7a is wound as shown in Fig. 7, and molded if necessary. and complete it. Therefore, the mold cost and the number of punching EUs are large (it takes a lot,
It takes a lot of work to stack them, and if the curved radius changes, an iron core that matches the curved radius is required each time, which increases the cost.

[Means for Solving the Problems j] According to the present invention, first, an iron core 5 as shown in FIG. 3 is punched out, and a corner iron core 4 shown in FIG. 4 is machined from a sintered material. Next, as shown in Fig. 2, a plurality of linear cores 5 are stacked and fixed, and the corner cores 4 are inserted and tightened between the stators 3A and at both ends. By assembling the bolts 1o, clamping plate 11, etc. into a pseudo-curved shape, and winding the winding 7 as shown in FIG. ,
A reduction in punching and assembly man-hours can be achieved.

[Function] A pseudo-curved primary stator 3 which is a combination of a stator 3Δ consisting of a linear iron core 5 as described above and a corner iron core 4.
When placed in a curved part of the conveyance path, the traveling magnetic field in the close contact area with the straight primary stator decreases almost to the same extent as in the case of a curved primary stator, and the secondary side The thrust applied to the conveyed object of the ijJ mover is not intermittent, so smooth acceleration is possible, without impacting the conveyed object, and in the case of three-dimensional conveyance, the curved part can be smoothly raised and lowered. and speed control is easily carried out.

``Example'' To explain one embodiment of the pseudo-curved linear motor according to the present invention, with reference to FIGS. 1 and 2, The primary stator 3 has a corner core 4 (FIG. 4) with an inverted T-shaped cross section and a fan-shaped base 4a between the stators 3A in which straight comb-shaped cores 5 shown in FIG. 3 are stacked. A corner core 4 is attached to both ends, and the core 4 is connected in an arc shape with a clamping plate 11 and a clamping bolt 10, and the winding 7 is wound around the groove 6 as shown in FIG. 1.Such a structure The pseudo-curved primary stator 3 is disposed in close contact with the primary stator of the straight portion of the transport path.

"Effect of the invention J: Since all the straight cores 5 have the same shape, mold costs and punching man-hours are extremely low, and the straight cores 5 and corner cores 4 can be assembled easily and without much effort. Even if the radius of curvature of the curved part of the conveyor path changes, the fan angle of the corner core can be changed to match each curved part, and the primary side of the straight part can be adjusted to the same degree as the integral curved primary stator. The decrease in the traveling magnetic field in the area adjacent to the stator is slight, and the pseudo-curved primary stator allows for smooth acceleration of the object carried by the secondary movable element without intermittent thrust. Semiconductor-related parts that require impact, specimens in hospitals, etc. can be transported without impact, and since the thrust of the linear motor acts continuously on curved sections, speed control can be achieved in the same way as on straight sections.

[Brief explanation of the drawing]

FIG. 1 is a diagrammatic perspective view of a pseudo-curved primary stator disposed on a tj-curve conveyance path of a pseudo-curved linear motor according to the present invention, and FIG. 2 is a diagram showing the winding shown in FIG. 1 before being wound. 3 is a front view of a straight core, FIG. 4 is a perspective view of a corner core, FIG. FIG. 7 is a perspective view of the primary stator at the curved portion of FIG. 6; FIG. 8 is a perspective view of the primary stator before winding the winding shown in FIG. 7; 9 and 10 are front views of the core before being assembled as shown in FIG. 8. (Explanation of symbols) 1... Rail 1a... Straight section 1b... Curved section 2, 3b... Straight primary stator 3.
Pseudo-curved primary stator 3Δ... Stator 3a... Curved primary side fixed 4... Corner core 4a... Base 5.5a, 5b... Core 6... Groove 7. 7a ... Winding wire 8.9 ... Gap 10 ... Tightening bolt 11 ... Tightening plate Fig. 3 Fig. 5 Figure 10

Claims (1)

[Claims] A pseudo-curved linear motor including a pseudo-curved primary stator disposed in a conveyance path having a curved portion driven by a linear motor, wherein the pseudo-curved primary stator is made of a straight iron core. The pseudo-simulator is characterized in that it is constructed in a polygonal shape from a stator and a corner iron core, so that objects to be transported through the curved portion are smoothly accelerated and transported without being subjected to impact. Curved linear motor.